PLATE XVIII. 



[Part lll.—Januari/ 1883.] 



Fig. 1. M.\CROCHLAMYs iNDicA, Bs., uat. size. Calcutta. Showing position of the right 



shell-lobe in life, somewhat contracted. 

 '2. Ditto, spirit-specimen: view of right side, x 4, showing :—)•„*./., right shell-lobe ; 



r.d.L, l.d.L, right dorsal lobe and left dorsal lohe. 

 3. Ditto, ditto : left side, with left shell-lobe {l.s.l.) and posterior termination of the 



left dorsallobe {l.d.l.). 

 4). Ditto : sketch of end of the foot, from life, somewhat enlarged. 

 5,5 a. Ditto, shell of, x 2-4.. 

 G. Ditto: generative organs, x 4: h.d., hermaph. duct; Al.Gd., albumen-gland; 



U.V., oviduct; P., penis; c.r.P., caecum of retractor muscle of the penis; c.d., 



caecum calciferum, or kalk-sac; D, the amatorial organ. 



7. Ditto : jaw, x 20. 



8, 8 «, 8 b. Portion of the radula, x 360 ; central, median, and lateral teeth. 



